Description

The TMR3110 is a contactless, high-precision, and

high-speed magnetic rotary encoder sensor, which

integrated with tunneling magnetoresistance (TMR)

sensors and CMOS digital signal processing circuitry.

The TMR3110 senses the single pole-pair magnet

rotation above the chip by TMR sensors, collects the

rotating magnetic field signal, transmits it to the digital

processing unit, and calculates the rotation angle.

The TMR3110 supports 3-wire and 4-wire SPI working

modes, allowing the client MCU to read 23-bit absolute

position information through the SPI protocol.

Additionally, the chip also provides a 12-bit resolution

PWM output interface, with the PWM frequency

configurable in four levels according to customer

requirements.

It is able to output A/B phase programmable

incremental position signal with 1 to 4096 pulse

and programmable zero-point (Z phase) signal.

TMR3110 also provides inverted UVW output,

analog and PWM signals, with rotational speed up to

40,000 RPM.

The TMR3110 can self-calibrate to compensate

non-linearities caused by imperfect installation.

Features and Benefits

• Tunneling magnetoresistance (TMR) technology

• Supply voltage: 3.3 V to 5 V

• Supply current: 10 mA (typical)

• Supports 0° to 360° absolute angle detection

• On and off axis measurements

• Available in SPI, ABZ, UVW, and PWM interfaces

• Programmable A/B/Z interpolation factors from ×1

to ×4096

• Programmable inverted UVW output resolution in

1 to 32 pole-pair

• Angular output delay < 2 μs

• Angular repeatability < ±0.05°

• Speeds up to 40,000 RPM

• Self-calibration function

• Integrated automatic gain calibration function

• Integrated EEPROM rewritable over 1000 cycles

• RoHS & REACH compliant

Applications

• Contactless angular position measurement

• Brushless motor position sensing

• Rotary speed sensing

• Close loop stepper system

• Servo encoder